OxygenHandler

local bar = script.Parent.BarBG.Bar
local oxygenLabel = script.Parent.BarBG.OxygenAmount

local maxOxygen = 100
local currentOxygen = maxOxygen

local timePerLoss = 0.3

local isSwimming = false

local char = game.Players.LocalPlayer.Character
local hum = char:WaitForChild("Humanoid")


hum.StateChanged:Connect(function(oldState, newState)


    if newState == Enum.HumanoidStateType.Swimming then

        isSwimming = true

    else
        isSwimming = false
    end
end)


while wait(timePerLoss) do


    if isSwimming then

        currentOxygen = math.clamp(currentOxygen - 1, 0, maxOxygen)

    else
        currentOxygen = math.clamp(currentOxygen + 1, 0, maxOxygen)
    end


    if currentOxygen < 1 then

        hum.Health = 0
    end


    local barScale = currentOxygen / maxOxygen
    bar:TweenSize(UDim2.new(barScale, 0, 1, 0), "InOut", "Linear", timePerLoss)

    oxygenLabel.Text = currentOxygen .. " / " .. maxOxygen
end